JJC Lake 

JJC Lake 

JJC Lake Rehabilitation and Management Project

The Joliet Junior College Lake is a central aesthetic feature of the main campus. The 5.8 acre lake has a 362 acre watershed which includes the college campus; parking lots; wooded, farm and open fields; and residential and commercial developments. The JJC Lake is eutrophic; this condition causes water quality degradation.

A grant-funded rehabilitation project is underway to restore the natural beauty and ecological health of the JJC Lake. Fertilizers, pesticides and herbicides from surrounding lawns and agricultural fields flow into the lake through storm water runoff. Nutrient-rich sediments accumulate, causing an explosion of plant and algal growth. This depletes oxygen levels, which leads to fish kills. The accumulation of sediment has also reduced the lake's water-holding capacity by 20 percent. The rehabilitation efforts will address these issues with the goal of restoring the quality, health and natural beauty of the lake.

Project highlights:

  • 6,300 cubic yards of sediment will be dredged from the lake and distributed on the college's agricultural fields; after dewatering, the nutrient-rich sediment will be spread over the Ag field
  • Best management practices (BMP's) will be established and implemented to reduce non-point source pollution and ensure the long-term health of the lake
  • Separators and Wetland Swale will be installed to filter runoff water from the parking lots
  • Bioswales and a Bio-Filter Cell will be installed to filter runoff water from agricultural fields, grass fields and residential areas before it enters the lake
  • Native plant species will be planted along the shoreline to prevent soil erosion


  • Unsightly floating debris, odor problems and sediment buildup will be reduced
  • A clean, healthy habitat for fish, wildlife and native plant species will be restored
  • Approximately two feet will be added to the depth of the lake on average, restoring the lake's water-holding capacity
  • Education and research opportunities will be increased
  • This campus asset will continue to provide an outdoor laboratory for JJC faculty & students

Funding for this project provided, in part, by the Illinois Environmental Protection Agency through Section 319 of the Clean Water Act.

View the JJC Lake Project Presentation (PDF)

© 2012 Joliet Junior College

Joliet Junior College
1215 Houbolt Road, Joliet, IL 60431-8938
Phone: (815) 729-9020